Constant std::time::UNIX_EPOCH
1.8.0 · source · pub const UNIX_EPOCH: SystemTime;
Expand description
An anchor in time which can be used to create new SystemTime
instances or
learn about where in time a SystemTime
lies.
This constant is defined to be “1970-01-01 00:00:00 UTC” on all systems with
respect to the system clock. Using duration_since
on an existing
SystemTime
instance can tell how far away from this point in time a
measurement lies, and using UNIX_EPOCH + duration
can be used to create a
SystemTime
instance to represent another fixed point in time.
duration_since(UNIX_EPOCH).unwrap().as_secs()
returns
the number of non-leap seconds since the start of 1970 UTC.
This is a POSIX time_t
(as a u64
),
and is the same time representation as used in many Internet protocols.
§Examples
use std::time::{SystemTime, UNIX_EPOCH};
match SystemTime::now().duration_since(UNIX_EPOCH) {
Ok(n) => println!("1970-01-01 00:00:00 UTC was {} seconds ago!", n.as_secs()),
Err(_) => panic!("SystemTime before UNIX EPOCH!"),
}
Run